单项选择题
A.having a shorter duration of opening B.having a longer duration of opening C.closing sooner D.opening later
If you increase the clearance between a valve stem and ...
单项选择题If you increase the clearance between a valve stem and rocker arm, which of the listed condition will occur?（）
A.valve will open later B.valves will close later C.amount of fuel injected will be increased D.amount of fuel injected will be decreased
A drop in compression pressure in one cylinder of a die...
单项选择题A drop in compression pressure in one cylinder of a diesel engine can be caused by（）
A.a leaking fuel injection nozzle B.a clogged air filter C.early fuel injection D.burned valves
If a four-stroke/cycle diesel engine is started by inje...
单项选择题If a four-stroke/cycle diesel engine is started by injecting air into the cylinder, the pistons receiving the charge of starting air must be（）
A.on the power stroke B.on the exhaust stroke C.at the end of the power stroke D.at the start of the intake stroke
